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Bc it known that I, FRANCIS J. WEBER, of Carey, in the county of Wyandotte, and State-ofOhimhave invented a Self-Centring-Hub Mandrel and Set-Stad; and Ido hereby declare the following 'to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which- Figurel is aperspective view of a hub having one spoke inserted into it showing my improved device applied and ready for use.

Figure 2 is asectional view of g. 1.

Figure 3 is a sectional view of the sta-' and its key-rod for holding the gauge.

Similar letters of reference indicate corresponding parts in the sevenfal iigures.

This invention relates to a new and improved contrivance which is designed lfor use in setting spokes into the hubs of wheels, for ythe purpose of having-all the spokes inserted at the proper angle or dish." It consists mainly in a centring device which is adapted for finding the exact centre of the hole through a hub, und also for serving as a pivot for a revolving staff which carries the gauge by which the dish of thewheel is ix'ed, as will be hereinafter described. It also consists in so constructing the centring device that it shall serve as a means for centring and supporting the gauge-stad, and also for attaching this stati' to a hub so that the gauge 4will sweep around inthe path of a circle which is concentric' to the axis of the hub, as will be hereinafter described. It also consists in a novel device for securingthe gauge, by which the dish of the spokes is fixed to its staff at different distances from the centre ofthe hub, and also at different distances from a pla-ne intersecting thc centres of the mortiscs in the hub, as will be hereinafter described,

To enable others skilled in the art to understand my invention, I will describe its construction und operation.

In the accompanying drawings, A represents the hub of a wheel, which is bored out and mortised ready for receiving the spokes. B represents one spoke inserted int-o the hub A, ready for being adjusted and set to the proper dish or angle. Through the bore A of the hub A I insert a rod, a, having uponlit a cone, c, which abuts against a shoulder,.a, upon said rod, as shown in fig. 1. Upon the'opposite end of the rod a another cone c is put, with its apex directedinward toward the apex of its opposite cone. A set-screw, S, is then applied to the rod a, and screwed up tightly, thus confining the rod a in place in the vcentre of the hub. It will be seen that the two cones will adjust themselves, (while the screw S is being tightened,) tothe ends of the hub, and bring the axis of the roll a to exactly coincide with the axis of a bore, A', through the hub, which bore should be in the cent-re of the hub. Upon the enlarged shoulder a' a. stad, n, is slipped, which is perpendicular to the rod ai, and which is kept in place but allowed to turn around its rod-'a by means of a thumb-nut anda washer applied on the screw-threaded end of saidrod, as shown in Figs. l and 2. The staifn is a straight piece, of any suitable length, having a hole bored in its upper end in a direction with its length, for receiving apin, e, through which a number of holes are made transversely corresponding to holes which are made transversely through the stati', as shown in figs. 2 and -3. At the inner end of the pin e a wedge-key, 7*, is passed through a hole which is made transversely through the staff', so that said key will act upon and press outward the pin e, and thus rigidly secure in place a transverse gauge-rod, t, which is passed through the holes made throughithe stadat and pin e, as shown in fig. 2. After centring and confining the pivot-rod a to thc hub, which is done by screwing up thenut S on the inner end of the hub, it is only necessary to adjust the gauge-pin t in a proper position, and sccur'e it in place by pressing in the key 1'. When one spoke is adjusted to the proper dish, and

the gauge-pin brought up to it and secured to its staff as aforesaid, the other spokes are all set at the same dish hy the gaugepin.

Having described my invention, whatl claim as new, and desire to secure by Letters Patent, is The combination of perforated rod e and key r, with the staff n, and its gauge-pin t, substantially in the manner and for the purposes described.

y FRANCISJ. WEBER.

Witnesses;

E. H. SAGE, LEWIS O. Esami 

